public class SequenceDemo {
    public static void main(String[] args){
        //顺序结构
        System.out.println("a");
        System.out.println("b");
        System.out.println("c");
        System.out.println("d");
        System.out.println("e");
        int num1 =10;
        int num2 = 20;
        int result = num1 + num2;
        System.out.println(result);
    }
}
